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Physics

Physics
In general, which is the cause of a land breeze?

Temperature
None of these
Heat
Pressure

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Physics
A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be

R/5
5 R/4
5 R
4 R/5

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Physics
What is the SI unit of temperature?

Fahrenheit
Joule
Kelvin
Celsius

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Physics
A falling drop of rain water acquires the spherical shape due to

Surface Tension
Gravitational force
Viscosity
Atmospheric pressure

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Physics
The velocity of sound in moist air is more than in dry air because the moist air has

Less density than dry air.
More density than dry air.
More pressure than dry air.
Less pressure than dry air.

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Physics
If there is a circular hole in a metal plate, what happens to the radius of the hole when the plate is heated?

Depends upon the metal
Unchanged
Increases
Decreases

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